JPH08132910A - Shift lever device for automatic transmission - Google Patents

Abstract

PURPOSE: To transmit the motion of a shift lever correctly to an automatic transmission while reducing weight and the number of part items. CONSTITUTION: A shift lever device for an automatic transmission is provided with a shift lever 22 that can be oscillated around a control shaft 34, and an arm lever 50 interlocked with the oscillation of the shift lever 22. In this case, the shift lever 22 is formed of synthetic resin, and a cylinder part 27 for inserting the control shaft 34 with an arm lever 50 fitted thereto is integrally formed at the shift lever 22. The cylinder part 27 and the control shaft 34 are provided with fit-in parts 29, 37 fitted to each other so as to engage the cylinder part 27 and the control shaft 34 without play in the oscillating direction of the shift lever 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift lever device for an automatic transmission of an automobile, and more particularly, it is possible to accurately transmit the movement of the shift lever to an automatic transmission while reducing the weight and the number of parts. The present invention relates to a shift lever device for an automatic transmission.

[0002]

2. Description of the Related Art A shift lever device is provided in a passenger compartment, and a gear ratio of an automatic transmission can be selected by shifting a vertically extending shift lever, for example, in a front-rear direction.

FIG. 8 shows an example of a conventional shift lever device. As shown in FIG. 8, the shift lever 1 is composed of a metal pipe. A knob 2 having a push button is attached to the top of the shift lever 1. A cylindrical fulcrum member 3 made of a metal pipe is attached to the lower end of the shift lever 1 by welding. Fulcrum member 3
An arm lever 4 that extends downward is attached to this by welding. Bushings 5 are fitted to both ends of the fulcrum member 3. A single control shaft 6 is inserted through each bush 5. Both ends of the control shaft 6 are held by a plate body (not shown).

In the shift lever device of FIG. 8, the knob 2 of the shift lever 1 is swung in the front-rear direction of the vehicle, so that the shift lever 1 is swung about the control shaft 6. The swing of the shift lever 1 is transmitted to the arm lever 4 via the fulcrum member 3. Since the arm lever 4 is connected to the automatic transmission via a rod and a link (not shown), the operation amount of the shift lever 1 is transmitted to the automatic transmission and the gear ratio is switched.

[0005]

However, the conventional shift lever device shown in FIG. 8 has the following problems. Normally, the control shaft 6 may be directly inserted into the cylindrical fulcrum member 3, but since the shift lever 1 and the arm lever 4 are attached to the fulcrum member 3 by welding,
The fulcrum member is deformed due to thermal strain caused by welding. Therefore, the fulcrum member 3 after welding has reduced accuracy,
If the control shaft 6 is not attached via the bush 5, rattling at the time of operating the shift lever 1 becomes large, and the operation amount of the shift lever 1 cannot be accurately transmitted to the automatic transmission. Therefore, the conventional shift lever device has a problem that the number of parts such as the bush increases and the cost also increases.
Further, since the shift lever 1 is a metal member and is long in the up-down direction, the shift lever device occupies a large proportion of the weight in the shift lever device, and it is desired to reduce the weight.

An object of the present invention is to provide a shift lever device for an automatic transmission, which is capable of accurately transmitting the movement of the shift lever to an automatic transmission while reducing the weight and the number of parts.

[0007]

A shift lever device for an automatic transmission according to the present invention for achieving this object is as follows. In a shift lever device for an automatic transmission, comprising a shift lever swingable around a control shaft and an arm lever interlocking with the movement of the shift lever, the shift lever is made of synthetic resin, and the shift lever A tubular portion into which the control shaft having the arm lever attached is inserted, and the tubular portion and the control shaft are fitted to each other to rattle the tubular portion and the control shaft in the swinging direction of the shift lever. A shift lever device for an automatic transmission, characterized in that a fitting portion is provided for engaging without a shift.

[0008]

In the shift lever device for an automatic transmission according to the present invention, since the shift lever is made of synthetic resin, the weight can be reduced as compared with the case where the shift lever is made of a metal member. Further, since the tubular portion into which the control shaft is inserted is integrally formed with the shift lever, the tubular portion does not generate thermal strain due to welding, and the accuracy of the tubular portion can be improved. Therefore, a bush or the like as in the conventional technique is unnecessary, and the number of parts can be reduced. Since the cylinder portion of the shift lever and the control shaft are provided with a fitting portion which is fitted to each other and engages the cylinder portion and the control shaft without rattling in the swing direction of the shift lever, the shift lever swings. The directional movement is accurately transmitted to the arm lever via the fitting portion. Therefore, the movement of the shift lever is accurately transmitted from the arm lever to the automatic transmission.

[0009]

1 to 6 show a shift lever device 20 for an automatic transmission according to an embodiment of the present invention. FIG.
As shown in, the shift lever device 20 has a shift lever 22 extending in the vertical direction. Shift lever 22
Is composed of an outer lever portion 24 and an inner lever portion 26. Outer lever part 24 and inner lever part 2
Both 6 are made of synthetic resin. A push button 25 for shift operation is attached to the top of the inner lever portion 26. The top side of the inner lever portion 26 is covered with the outer lever portion 24. The detint rod 40 arranged in the inner lever portion 26 is interlocked with the movement of the push button 25. The detinting rod 40 includes a detinting plate 41 arranged beside the shift lever 22.
A detinting pin 42 is provided which can be engaged with.

At the lower part of the inner lever portion 26, a cylindrical tube portion 27 extending in the horizontal direction is formed. Tube 27
Is integrally formed with the inner lever portion 26 by injection molding. The tubular portion 27 extends to the left and right with respect to the lower portion of the inner lever portion 26. A metal control shaft 34 is inserted into the tubular portion 27. The inner peripheral surface of the tubular portion 27 is formed in three shapes. One of the inner peripheral surfaces of the tubular portion 27 is formed into a circular press-fitting hole 28. Tube 2
The other inner peripheral surface of 7 is formed with a hexagonal hole 29 as a fitting portion. Between the press-fitting hole 28 and the hexagonal hole 29 of the cylindrical portion 27, as shown in FIG. 4, a control shaft 34 is formed as an escape hole 30 into which the control shaft 34 is inserted with a gap.

As shown in FIG. 2, the control shaft 34 is formed with two circular shaft portions 35 and 36 and a hexagonal shaft portion 37 as a fitting portion. The hexagonal shaft portion 37 is located between the one circular shaft portion 35 and the other circular shaft portion 36. The circular shaft portion 35 on one side is provided with the press-fitting hole 28 of the tubular portion 27.
It is a portion including a portion to be press-fitted in and a portion to be inserted into the escape hole 30. The hexagonal shaft portion 37 is a hexagonal hole 29 of the tubular portion 27.
It is the part that is pressed into. One end of the circular shaft portion 35 is inserted into a holding hole 48 formed in the plate body 45. In the vicinity of the end surface of the circular shaft portion 35, a groove 35a in which an E-ring 47 for retaining is attached is formed.
The outer diameter of the other circular shaft portion 36 is larger than the outer diameter of the one circular shaft portion 35. The other circular shaft portion 36 is inserted into a holding hole 47 formed in the plate body 45.

An arm lever 50 made of a metal member is fitted to the end portion of the other circular shaft portion 36. The inner peripheral portion of the fitting hole 51 of the arm lever 50 and the outer peripheral portion of the fitting hole 51 are connected to the end surface of the other circular shaft portion 36 by welding W. The arm lever 50 moves the control shaft 34 so that it has a predetermined positional relationship with the hexagonal shaft portion 37.
Is linked to That is, the arm lever 50 is positioned with respect to the hexagonal shaft portion 37 around the axis of the control shaft 34 at a predetermined angle (phase difference).

The hexagonal shaft portion 37 of the control shaft 34
Is press-fitted into the hexagonal hole 29 of the tubular portion 27, so that the tubular portion 27 moves to the control shaft 34 and the shift lever 2
The two are engaged in the swinging direction F without rattling. As a result, the arm lever 50 connected to the control shaft 34 by welding has the swing direction F of the shift lever 22 with respect to the inner lever portion 26 of the shift lever 22.
It is connected without rattling. A rod 56 is connected to the lower end of the arm lever 50 via a pin 57. The other side of the rod 56 is connected to the automatic transmission via a link (not shown).

On one side wall of the plate body 45, an O
A stepped portion to which the ring 60 is attached is formed. The O-ring 60 is in contact with the side surface of the arm lever 50 and the outer peripheral surface of the control shaft. As a result, the gap between the control shaft 34 and the holding hole 48 is sealed. The connecting portion between the control shaft 34 and the arm lever 50 is covered with a cover 62. As shown in FIG. 6, the cover 62 is provided with a fitting groove 65 that fits into the plate body 45. Mating groove 6
A seal member 66 that seals a gap between the fitting groove 65 and the plate body 45 is attached to the member 5. A washer 68 is mounted between the other side wall of the plate body 45 and the E ring 47. As a result, the axial movement of the control shaft 34 with respect to the plate body 45 is restricted.

Next, the operation of the shift lever device for the automatic transmission will be described. When the shift operation of the shift lever 22 is performed, the push button 25 provided on the top of the shift lever 22 is pressed and the detint pin 42 provided on the detint rod 40 is pushed down. As a result, the detinto pin 42 and the detinto plate 4
1 is disengaged and the shift lever 22 is shifted to a predetermined position. During the shift operation of the shift lever 22, the shift lever 22 swings around the control shaft 34, and the arm lever 50 connected to the control shaft 34 also swings.

Hexagonal hole 29 of cylinder 27 of shift lever 22
Since the hexagonal shaft portion 37 of the control shaft 34 and the hexagonal shaft portion 37 of the control shaft 34 are press-fitted in the swinging direction F of the shift lever 22 without rattling, the movement of the shift lever 22 in the swinging direction F is caused by the hexagonal hole 29 and the hexagonal hole 29. It is accurately transmitted to the arm lever 50 via the fitting portion with the shaft portion 37. Therefore, the movement of the shift lever 22 is accurately transmitted from the arm lever 50 to the automatic transmission (not shown) via the rod 56 and the link (not shown).

Since the shift lever 22 is made of synthetic resin, the weight can be reduced as compared with the case where the inner lever portion 26 of the shift lever 22 is made of a metal member. Also,
Since the inner lever portion 26 and the tubular portion 27 are integrated by injection molding or the like, the tubular portion 27 is free from thermal strain such as welding, and the accuracy of the tubular portion 27 is improved. Therefore, a bush or the like as in the conventional technique is unnecessary, and the number of parts can be reduced.

Although the hexagonal hole 29 and the hexagonal shaft portion 37 have been described as an example of the fitting portion in the above embodiment, the fitting portion may be another polygonal shape or an oval shape. Further, as shown in FIG. 7, the control shaft 34 is provided with a plurality of protrusions 70 as fitting portions that protrude outward in the radial direction, and the cylindrical portion 2 is provided.
The same effect can be obtained even if the concave portion 72 as the fitting portion that fits with the protrusion 70 is provided in the seventh member 7.

[0019]

According to the shift lever device for an automatic transmission of the present invention, the shift lever is made of synthetic resin, and the shift lever is integrally formed with the tubular portion into which the control shaft having the arm lever is inserted. Molded,
A fitting portion is provided on the tubular portion and the control shaft so that the tubular portion and the control shaft are engaged with each other without rattling in the swinging direction of the shift lever, so that the weight and the number of parts can be reduced. , The movement of the shift lever can be accurately transmitted to the automatic transmission. Further, by inserting the control shaft into the tubular portion, the arm lever can be easily positioned with respect to the shift lever, and the work efficiency of assembling the shift lever device can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a shift lever device for an automatic transmission according to an embodiment of the present invention.

FIG. 2 is an enlarged front view of a control shaft in the apparatus shown in FIG.

FIG. 3 is an enlarged sectional view taken along line AA of FIG. 1;

FIG. 4 is an enlarged cross-sectional view taken along the line BB of FIG.

5 is an exploded perspective view showing a connecting structure of a shift lever, a control shaft, and an arm lever in the apparatus of FIG.

FIG. 6 is a perspective view of a plate body in the apparatus of FIG.

7 is an enlarged cross-sectional view showing a modified example of the fitting portion of FIG.

FIG. 8 is an exploded perspective view showing an example of a conventional shift lever device for an automatic transmission.

[Explanation of symbols]

 22 Shift Lever 27 Tube 29 Hexagonal Hole as Fitting 34 Control Shaft 37 Hexagonal Shaft as Fitting 50 Arm Lever

Claims (1)

[Claims] 1. A shift lever device for an automatic transmission, comprising a shift lever swingable about a control shaft and an arm lever interlocked with the movement of the shift lever, wherein the shift lever is made of synthetic resin. At the same time, the shift lever is integrally formed with a tubular portion into which the control shaft to which the arm lever is attached is inserted, and the tubular portion and the control shaft are fitted to each other so that the tubular portion and the control shaft move. A shift lever device for an automatic transmission, characterized in that a shift lever device is provided which is engaged with the motion lever without rattling.